I've got a starter kit with a DIP 40 pin Atmel MC. The part just says 89C51RD2-IM on it. Can I use the newer AT89C51 versions as well? The software seems to support it but I'm wondering if the pinout, voltage levels, etc. are the same.
Thanks, Andrew Queisser
I did a Google and found this. Ain't Google grand.
Jay
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pinout is the same, just watch for different functions, i.e. timers, registers, a/d, d/a etc, check power ranges and osc freq. rw
T89C51RD2 is the same as AT89C51ED2
*EXCEPT* the eeprom write procedure is different and the bootloader is in ROM, you have to map it in using the ENBOOT bit. Also the bootloader occupies more memory map than in the T..RD2In article , MArk writes
well, it would be handy if you could but some of the differences are not clearly documented.
When was the last time he ran diff on two .PDF files?
Or, you could go to the Atmel web, under Products / 8051 Architecture / App Notes
And find the one called Migration from T89C51RD2 to AT89C51RD2/ED2 (16 pages, updated 6/03)
URL is
-jg
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